root / common.sh @ 63f1d9e7
History | View | Annotate | Download (9.2 kB)
| 1 |
#!/bin/bash |
|---|---|
| 2 |
|
| 3 |
source /etc/default/snf-network |
| 4 |
|
| 5 |
function try {
|
| 6 |
|
| 7 |
$1 &>/dev/null || true |
| 8 |
|
| 9 |
} |
| 10 |
|
| 11 |
function clear_routed_setup_ipv4 {
|
| 12 |
|
| 13 |
arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle |
| 14 |
while ip rule del dev $INTERFACE; do :; done |
| 15 |
iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP |
| 16 |
|
| 17 |
} |
| 18 |
|
| 19 |
function clear_routed_setup_ipv6 {
|
| 20 |
|
| 21 |
while ip -6 rule del dev $INTERFACE; do :; done |
| 22 |
|
| 23 |
} |
| 24 |
|
| 25 |
function delete_neighbor_proxy {
|
| 26 |
|
| 27 |
if [ -z "$EUI64" -z -o "$UPLINK6" ]; then |
| 28 |
return |
| 29 |
fi |
| 30 |
|
| 31 |
$SNF_NETWORK_LOG $0 "ip -6 neigh del proxy $EUI64 dev $UPLINK6" |
| 32 |
ip -6 neigh del proxy $EUI64 dev $UPLINK6 |
| 33 |
|
| 34 |
} |
| 35 |
|
| 36 |
function clear_routed_setup_firewall {
|
| 37 |
|
| 38 |
for oldchain in protected unprotected limited; do |
| 39 |
iptables -D FORWARD -o $INTERFACE -j $oldchain |
| 40 |
ip6tables -D FORWARD -o $INTERFACE -j $oldchain |
| 41 |
done |
| 42 |
|
| 43 |
} |
| 44 |
|
| 45 |
function clear_ebtables {
|
| 46 |
|
| 47 |
runlocked $RUNLOCKED_OPTS ebtables -D FORWARD -i $INTERFACE -j $FROM |
| 48 |
runlocked $RUNLOCKED_OPTS ebtables -D INPUT -i $INTERFACE -j $FROM |
| 49 |
runlocked $RUNLOCKED_OPTS ebtables -D FORWARD -o $INTERFACE -j $TO |
| 50 |
runlocked $RUNLOCKED_OPTS ebtables -D OUTPUT -o $INTERFACE -j $TO |
| 51 |
|
| 52 |
runlocked $RUNLOCKED_OPTS ebtables -X $FROM |
| 53 |
runlocked $RUNLOCKED_OPTS ebtables -X $TO |
| 54 |
} |
| 55 |
|
| 56 |
|
| 57 |
function clear_nfdhcpd {
|
| 58 |
|
| 59 |
rm $NFDHCPD_STATE_DIR/$INTERFACE |
| 60 |
|
| 61 |
} |
| 62 |
|
| 63 |
|
| 64 |
function routed_setup_ipv4 {
|
| 65 |
|
| 66 |
if [ -z "$INTERFACE" -o -z "$NETWORK_GATEWAY" -o -z "$IP" -o -z "$TABLE" ] |
| 67 |
then |
| 68 |
return |
| 69 |
fi |
| 70 |
|
| 71 |
# mangle ARPs to come from the gw's IP |
| 72 |
arptables -A OUTPUT -o $INTERFACE --opcode request -j mangle --mangle-ip-s "$NETWORK_GATEWAY" |
| 73 |
|
| 74 |
# route interface to the proper routing table |
| 75 |
ip rule add dev $INTERFACE table $TABLE |
| 76 |
|
| 77 |
# static route mapping IP -> INTERFACE |
| 78 |
ip route replace $IP proto static dev $INTERFACE table $TABLE |
| 79 |
|
| 80 |
# Enable proxy ARP |
| 81 |
echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/proxy_arp |
| 82 |
|
| 83 |
} |
| 84 |
|
| 85 |
function send_garp {
|
| 86 |
|
| 87 |
if [ -z "$IP" -o -z "$UPLINK" ]; then |
| 88 |
return |
| 89 |
fi |
| 90 |
|
| 91 |
# Send GARP from host to upstream router |
| 92 |
echo 1 > /proc/sys/net/ipv4/ip_nonlocal_bind |
| 93 |
$SNF_NETWORK_LOG $0 "arpsend -U -i $IP -c1 $UPLINK" |
| 94 |
arpsend -U -i $IP -c1 $UPLINK |
| 95 |
echo 0 > /proc/sys/net/ipv4/ip_nonlocal_bind |
| 96 |
|
| 97 |
} |
| 98 |
|
| 99 |
function routed_setup_ipv6 {
|
| 100 |
|
| 101 |
if [ -z "$EUI64" -o -z "$TABLE" -o -z "$INTERFACE" -o -z "$UPLINK6" ] |
| 102 |
then |
| 103 |
return |
| 104 |
fi |
| 105 |
# Add a routing entry for the eui-64 |
| 106 |
ip -6 rule add dev $INTERFACE table $TABLE |
| 107 |
ip -6 ro replace $EUI64/128 dev $INTERFACE table $TABLE |
| 108 |
ip -6 neigh add proxy $EUI64 dev $UPLINK6 |
| 109 |
|
| 110 |
# disable proxy NDP since we're handling this on userspace |
| 111 |
# this should be the default, but better safe than sorry |
| 112 |
echo 0 > /proc/sys/net/ipv6/conf/$INTERFACE/proxy_ndp |
| 113 |
|
| 114 |
# Send Unsolicited Neighbor Advertisement |
| 115 |
$SNF_NETWORK_LOG $0 "ndsend $EUI64 $UPLINK6" |
| 116 |
ndsend $EUI64 $UPLINK6 |
| 117 |
|
| 118 |
} |
| 119 |
|
| 120 |
# pick a firewall profile per NIC, based on tags (and apply it) |
| 121 |
function routed_setup_firewall {
|
| 122 |
# for latest ganeti there is no need to check other but uuid |
| 123 |
ifprefixindex="synnefo:network:$INTERFACE_INDEX:" |
| 124 |
ifprefixname="synnefo:network:$INTERFACE_NAME:" |
| 125 |
ifprefixuuid="synnefo:network:$INTERFACE_UUID:" |
| 126 |
for tag in $TAGS; do |
| 127 |
tag=${tag#$ifprefixindex}
|
| 128 |
tag=${tag#$ifprefixname}
|
| 129 |
tag=${tag#$ifprefixuuid}
|
| 130 |
case $tag in |
| 131 |
protected) |
| 132 |
chain=protected |
| 133 |
;; |
| 134 |
unprotected) |
| 135 |
chain=unprotected |
| 136 |
;; |
| 137 |
limited) |
| 138 |
chain=limited |
| 139 |
;; |
| 140 |
esac |
| 141 |
done |
| 142 |
|
| 143 |
if [ "x$chain" != "x" ]; then |
| 144 |
iptables -A FORWARD -o $INTERFACE -j $chain |
| 145 |
ip6tables -A FORWARD -o $INTERFACE -j $chain |
| 146 |
fi |
| 147 |
} |
| 148 |
|
| 149 |
function init_ebtables {
|
| 150 |
|
| 151 |
runlocked $RUNLOCKED_OPTS ebtables -N $FROM -P RETURN |
| 152 |
runlocked $RUNLOCKED_OPTS ebtables -A FORWARD -i $INTERFACE -j $FROM |
| 153 |
# This is needed for multicast packets |
| 154 |
runlocked $RUNLOCKED_OPTS ebtables -A INPUT -i $INTERFACE -j $FROM |
| 155 |
|
| 156 |
runlocked $RUNLOCKED_OPTS ebtables -N $TO -P RETURN |
| 157 |
runlocked $RUNLOCKED_OPTS ebtables -A FORWARD -o $INTERFACE -j $TO |
| 158 |
# This is needed for multicast packets |
| 159 |
runlocked $RUNLOCKED_OPTS ebtables -A OUTPUT -o $INTERFACE -j $TO |
| 160 |
|
| 161 |
} |
| 162 |
|
| 163 |
|
| 164 |
function setup_ebtables {
|
| 165 |
|
| 166 |
# do not allow changes in ip-mac pair |
| 167 |
if [ -n "$IP" ]; then |
| 168 |
:; # runlocked $RUNLOCKED_OPTS ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP |
| 169 |
fi |
| 170 |
runlocked $RUNLOCKED_OPTS ebtables -A $FROM -s \! $MAC -j DROP |
| 171 |
# accept dhcp responses from host (nfdhcpd) |
| 172 |
# this is actually not needed because nfdhcpd opens a socket and binds is with |
| 173 |
# tap interface so dhcp response does not go through bridge |
| 174 |
# runlocked $RUNLOCKED_OPTS ebtables -A $TO -s $INDEV_MAC -p ipv4 --ip-protocol=udp --ip-destination-port=68 -j ACCEPT |
| 175 |
# allow only packets from the same mac prefix |
| 176 |
runlocked $RUNLOCKED_OPTS ebtables -A $TO -s \! $MAC/$MAC_MASK -j DROP |
| 177 |
} |
| 178 |
|
| 179 |
function setup_masq {
|
| 180 |
|
| 181 |
# allow packets from/to router (for masquerading) |
| 182 |
# runlocked $RUNLOCKED_OPTS ebtables -A $TO -s $NODE_MAC -j ACCEPT |
| 183 |
# runlocked $RUNLOCKED_OPTS ebtables -A INPUT -i $INTERFACE -j $FROM |
| 184 |
# runlocked $RUNLOCKED_OPTS ebtables -A OUTPUT -o $INTERFACE -j $TO |
| 185 |
return |
| 186 |
|
| 187 |
} |
| 188 |
|
| 189 |
function setup_nfdhcpd {
|
| 190 |
umask 022 |
| 191 |
FILE=$NFDHCPD_STATE_DIR/$INTERFACE |
| 192 |
#IFACE is the interface from which the packet seems to arrive |
| 193 |
#needed in bridged mode where the packets seems to arrive from the |
| 194 |
#bridge and not from the tap |
| 195 |
cat >$FILE <<EOF |
| 196 |
INDEV=$INDEV |
| 197 |
IP=$IP |
| 198 |
MAC=$MAC |
| 199 |
HOSTNAME=$INSTANCE |
| 200 |
TAGS="$TAGS" |
| 201 |
GATEWAY=$NETWORK_GATEWAY |
| 202 |
SUBNET=$NETWORK_SUBNET |
| 203 |
GATEWAY6=$NETWORK_GATEWAY6 |
| 204 |
SUBNET6=$NETWORK_SUBNET6 |
| 205 |
EUI64=$EUI64 |
| 206 |
EOF |
| 207 |
|
| 208 |
} |
| 209 |
|
| 210 |
function get_uplink {
|
| 211 |
|
| 212 |
local table=$1 |
| 213 |
UPLINK=$(ip route list table $table | grep "default via" | awk '{print $5}')
|
| 214 |
UPLINK6=$(ip -6 route list table $table | grep "default via" | awk '{print $5}')
|
| 215 |
$SNF_NETWORK_LOG $0 "* Table $table: uplink -> $UPLINK, uplink6 -> $UPLINK6" |
| 216 |
|
| 217 |
} |
| 218 |
|
| 219 |
# Because we do not have IPv6 value in our environment |
| 220 |
# we caclulate it based on the NIC's MAC and the IPv6 subnet (if any) |
| 221 |
# first argument MAC second IPv6 subnet |
| 222 |
# Changes global value EUI64 |
| 223 |
get_eui64 () {
|
| 224 |
|
| 225 |
local mac=$1 |
| 226 |
local prefix=$2 |
| 227 |
|
| 228 |
if [ -z "$prefix" ]; then |
| 229 |
EUI64= |
| 230 |
else |
| 231 |
EUI64=$($MAC2EUI64 $mac $prefix) |
| 232 |
$SNF_NETWORK_LOG $0 "* $mac + $prefix -> $EUI64" |
| 233 |
fi |
| 234 |
|
| 235 |
} |
| 236 |
|
| 237 |
|
| 238 |
# DDNS related functions |
| 239 |
|
| 240 |
# ommit zone statement |
| 241 |
# nsupdate will attempt determine the correct zone to update based on the rest of the input |
| 242 |
send_command () {
|
| 243 |
|
| 244 |
local command="$1" |
| 245 |
$SNF_NETWORK_LOG $0 "* $command" |
| 246 |
nsupdate -k $KEYFILE > /dev/null << EOF |
| 247 |
server $SERVER |
| 248 |
$command |
| 249 |
send |
| 250 |
EOF |
| 251 |
|
| 252 |
} |
| 253 |
|
| 254 |
|
| 255 |
update_arecord () {
|
| 256 |
|
| 257 |
local action=$1 |
| 258 |
local command= |
| 259 |
if [ -n "$IP" ]; then |
| 260 |
command="update $action $GANETI_INSTANCE_NAME.$FZONE $TTL A $IP" |
| 261 |
send_command "$command" |
| 262 |
fi |
| 263 |
|
| 264 |
} |
| 265 |
|
| 266 |
|
| 267 |
update_aaaarecord () {
|
| 268 |
|
| 269 |
local action=$1 |
| 270 |
local command= |
| 271 |
if [ -n "$EUI64" ]; then |
| 272 |
command="update $action $GANETI_INSTANCE_NAME.$FZONE $TTL AAAA $EUI64" |
| 273 |
send_command "$command" |
| 274 |
fi |
| 275 |
|
| 276 |
} |
| 277 |
|
| 278 |
|
| 279 |
update_ptrrecord () {
|
| 280 |
|
| 281 |
local action=$1 |
| 282 |
local command= |
| 283 |
if [ -n "$IP" ]; then |
| 284 |
command="update $action $RLPART.$RZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE" |
| 285 |
send_command "$command" |
| 286 |
fi |
| 287 |
|
| 288 |
} |
| 289 |
|
| 290 |
update_ptr6record () {
|
| 291 |
|
| 292 |
local action=$1 |
| 293 |
local command= |
| 294 |
if [ -n "$EUI64" ]; then |
| 295 |
command="update $action $R6LPART$R6ZONE. $TTL PTR $GANETI_INSTANCE_NAME.$FZONE" |
| 296 |
send_command "$command" |
| 297 |
fi |
| 298 |
|
| 299 |
} |
| 300 |
|
| 301 |
update_all () {
|
| 302 |
|
| 303 |
local action=$1 |
| 304 |
$SNF_NETWORK_LOG $0 "Update ($action) dns for $GANETI_INSTANCE_NAME $IP $EUI64" |
| 305 |
update_arecord $action |
| 306 |
update_aaaarecord $action |
| 307 |
update_ptrrecord $action |
| 308 |
update_ptr6record $action |
| 309 |
|
| 310 |
} |
| 311 |
|
| 312 |
|
| 313 |
# first argument is an eui64 (IPv6) |
| 314 |
# sets GLOBAL args R6REC, R6ZONE, R6LPART |
| 315 |
# lets assume eui64=2001:648:2ffc:1::1 |
| 316 |
# the following commands produce: |
| 317 |
# R6REC=1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.c.f.f.2.8.4.6.0.1.0.0.2.ip6.arpa |
| 318 |
# R6ZONE=1.0.0.0.c.f.f.2.8.4.6.0.1.0.0.2.ip6.arpa |
| 319 |
# R6LPART=1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0. |
| 320 |
get_rev6_info () {
|
| 321 |
|
| 322 |
local eui64=$1 |
| 323 |
if [ -z "$eui64" ]; then |
| 324 |
R6REC= ; R6ZONE= ; R6LPART= ; |
| 325 |
else |
| 326 |
R6REC=$(host $eui64 | egrep -o '([[:alnum:]]\.){32}ip6.arpa' )
|
| 327 |
R6ZONE=$(echo $R6REC | awk -F. 'BEGIN{rpart="";} { for (i=32;i>16;i=i-1) rpart=$i "." rpart; } END{print rpart "ip6.arpa";}')
|
| 328 |
R6LPART=$(echo $R6REC | awk -F. 'BEGIN{lpart="";} { for (i=16;i>0;i=i-1) lpart=$i "." lpart; } END{print lpart;}')
|
| 329 |
fi |
| 330 |
|
| 331 |
} |
| 332 |
|
| 333 |
|
| 334 |
# first argument is an ipv4 |
| 335 |
# sets args RZONE, RLPART |
| 336 |
# lets assume IP=203.0.113.1 |
| 337 |
# RZONE="113.0.203.in-add.arpa" |
| 338 |
# RLPART="1" |
| 339 |
get_rev4_info () {
|
| 340 |
|
| 341 |
local ip=$1 |
| 342 |
if [ -z "$ip" ]; then |
| 343 |
RZONE= ; RLPART= ; |
| 344 |
else |
| 345 |
OLDIFS=$IFS |
| 346 |
IFS=". " |
| 347 |
set -- $ip |
| 348 |
a=$1 ; b=$2; c=$3; d=$4; |
| 349 |
IFS=$OLDIFS |
| 350 |
RZONE="$c.$b.$a.in-addr.arpa" |
| 351 |
RLPART="$d" |
| 352 |
fi |
| 353 |
|
| 354 |
} |
| 355 |
|
| 356 |
|
| 357 |
# Use environment variables to calculate desired info |
| 358 |
# IP, MAC, LINK, TABLE, BRIDGE, |
| 359 |
# NETWORK_SUBNET, NETWORK_GATEWAY, NETWORK_SUBNET6, NETWORK_GATEWAY6 |
| 360 |
function get_info {
|
| 361 |
|
| 362 |
$SNF_NETWORK_LOG $0 "Getting info for $INTERFACE of $GANETI_INSTANCE_NAME" |
| 363 |
get_rev4_info $IP |
| 364 |
get_eui64 $MAC $NETWORK_SUBNET6 |
| 365 |
get_rev6_info $EUI64 |
| 366 |
get_uplink $TABLE |
| 367 |
|
| 368 |
} |
| 369 |
|
| 370 |
|
| 371 |
# Query nameserver for entries related to the specific instance |
| 372 |
# An example output is the following: |
| 373 |
# www.google.com has address 173.194.113.114 |
| 374 |
# www.google.com has address 173.194.113.115 |
| 375 |
# www.google.com has address 173.194.113.116 |
| 376 |
# www.google.com has address 173.194.113.112 |
| 377 |
# www.google.com has address 173.194.113.113 |
| 378 |
# www.google.com has IPv6 address 2a00:1450:4001:80b::1012 |
| 379 |
query_dns () {
|
| 380 |
|
| 381 |
HOSTQ="host -s -R 3 -W 3" |
| 382 |
HOST_IP_ALL=$($HOSTQ $GANETI_INSTANCE_NAME.$FZONE $SERVER | sed -n 's/.*has address //p') |
| 383 |
HOST_IP6_ALL=$($HOSTQ $GANETI_INSTANCE_NAME.$FZONE $SERVER | sed -n 's/.*has IPv6 address //p') |
| 384 |
|
| 385 |
} |